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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74ea7c25109144e88926fa8d87949d804ac090a81597ea85f2c45313e41dcfe1' 
  AND token = 'grO/WCyvpwR2s4/0v8LaoMXwbxca5TVe6Sf5RjysT3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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