SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31b1906ae779667b73c937f323882b0e65828b479c7d6d3bf35d1159120fb09b' 
  AND token = 'f/nJeJ5EsCYUQsnx3NuB5SJaQzzrNr9/K6upw8hngZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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