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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03fd77a1fc7cd61fb017b2a129298243aae53c908f07a410fe013ba3028eda26' 
  AND token = 'FbPbiliJWHaf8XjowtVPKfoxDQx8xEeGZj578JoL4KQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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