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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c32fda8a73ce984b6c7cb3b8d6daf8fe8553b4e6c9311d011bb4b16ff4148dea' 
  AND token = 'CAWOL3rWXaR3Dy7t6FGsrT4Kc3GZzwvIx5ptu41oGT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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