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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afde7abd602c967fe78e1d0c3b2dc9d9f3a746a8109c81de1ea6db60686938bd' 
  AND token = 'w187xkvPWppup63YdUEZjai4ap1lohzjyMruU8vm6go=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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