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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7792217e2ab01d95f710e30b77876e8094dc67c42c83abcc2d1eb8d9714018df' 
  AND token = 'lTOgy9XsjmFC0LnVoacZxluxZBj83i+1N/Q4oyCbFZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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