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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a37d0d24438f6e8997bf30f1d88ecbc96a5b21482c23ea69920a57ac69a71038' 
  AND token = '09CDJR47Fd5OfKpHbgzDUg2llbTPZvwycS1c8AYSaLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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