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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e7e9595b98c08e7b0fc8e0ac6c86481872863cb2aafdd1c3317dadb55a3907c' 
  AND token = 'O0m8mwE4gVkLdkeGsWtxHMMPPBgLCBTQwCkmWN8udWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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