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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2e570d8ee9597247f8f80857b595e6b276b232974ff329d600a2f515d70a380' 
  AND token = 'uo/aOBMtTEw5x/rObimz0T7GkxHGB4HlVxNHTiAuIMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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