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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32bfd8ffc27068ce11d5f0f8a7e5f42d28203330d67fcba97a7622f0bfa97c7e' 
  AND token = 'mV7XxjsS5/zZArI2HSY5nnAK0jSC2ULlGgUeccYQjC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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