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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6305eed9ad44faa8c6103aff3451f2671e746d843baef4c86bbcd73961b2b939' 
  AND token = 'TMrhPZ9APvfn/tmiWlTat/ZohT4EJQ1H1n7W5+wWAes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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