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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61066eab7fcde132016705752adf1865e180f80f665265e24b28dace4a573bb6' 
  AND token = '2wPfyrP3zYWrMISF3xbsd0G2L9/EUjFs67wGB0OsRYQ=' 
  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"
    }
  }
}