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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd35c426f866a66ec84df69534b718b9ac5a30ae03e09e3c3df95c7000fbce0b5' 
  AND token = 'VNGWoKb50oN3P3Gz3eDcBvqSdncHZSa5Y9olPJyJldo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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