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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7bea10288fb9c9b70b0c7b3c322ccaf1fec822e7ac09de3c7d74f549e303f29a' 
  AND token = 'CE5hGfuykEjmZut9KscbbKt/krQNNLGRvzi2Q6Fsx5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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