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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95a5406bbacee4121918dd0ad9611fd1b40ace3d37e241179d351ac3d2f016ef' 
  AND token = 'wukfnA19q8hjYV/czt8qdo5MWALxW548BjdXw26P+c8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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