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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e7a589939d077752848d9e44527231ab8711737abb300489110c0919370ab589' 
  AND token = 'Mrtwonrg9hQ3+7O1lDs7BNc8VxyB/OHA2hwLKUqnVmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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