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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01cd4d83fef068b82362fb32f31a32e0ad33fe6ecf8baebaa7a5cb701368abdd' 
  AND token = 'aJwLT3mXG2tccIxrouaPoL3AZr9ZVjb8QcwSEgEJ9yA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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