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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e11a3a7f9fa244a1b0157f71cc5d586e64ec3a03c8c7a80595da5e4db39b85a' 
  AND token = 'NeS36P/EqnHn67YaLbxtIA6E+nqEt0Ud7eR8xDhoXX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}