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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c3041c3ac1b4508c920453f7a535b25d69febdba7af9900d25b924f33657cfa' 
  AND token = 'v2lFyOVFgokogkqULKAbaFEGTHJYh2cj71oqaYYr6lA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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