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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be7c525b028cf8f8de97d0159f5210ed6e7ecc01b89566c2ed1641fb30efb1da' 
  AND token = 'AfvV9gsBmw78/MozRL5jwA7EXrjmAVSQsJq5LHYEXdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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