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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '458128eb254b96546565dc623b941ac3e6325cb204e716e5abfb86783f9ffeaa' 
  AND token = 'NI7Lgn2x3CZqSQIxHkcnhwOtpER2vrIbN1NdAgvkxLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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