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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '144bc3ee98c7c3fa870b692bb934ca5237fa1269063018a776cc3d9bc945ea55' 
  AND token = 'Nlw/PGehH2lIbvMLzbM4rcKALnw1S/hCPkC3ciBM2sk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}