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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd07ab69770200dd76ade6eaed3370126a84d71ddbcf151c56f0e02684c94a106' 
  AND token = 'FueKRvUqkoqpOGwUwcQ1o6A1jWyw8Z8f8DxfOOtTthc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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