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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd236d36782abda1bc7ee8af267c6067074091d48a318b63fa5a80e417a44dc1a' 
  AND token = 'pHzGc1ENSdAUOKk1pjbQWQ44QaD++0Yc+q7aDAy2W+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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