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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cedb14c9c707a4b3e6ae3bbdaa34c539423605f0c616b89467400fd216a2684' 
  AND token = '8nqK+wgsfiwngYz0Ixo0aSe5Lzc5r4OZxeqxWBMgP0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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