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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64ed9c7049b986feb2c1955be3046a9e476e759edb8ff5919d108a63819fb66f' 
  AND token = 'HQF6iJyHm8UfhAczgMTA0qGnIB0AmchP8Zp/OTAhyT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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