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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba6fc6f2e716775856370eba9d23e514e5037ccbd7e7a3578b6fda936b4dd5b9' 
  AND token = 'jFDy8hNsm0dhYcm3JGWq9q6KgEHdPjgy35xGnrW8xGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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