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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e3680dda6df5bb6127a1aca2197c71ebc4ca99f9e6e7fc398ad0fc78a4437b8c' 
  AND token = 'mAZn7xC1ffTSEwZhdK/7oJZd9Zsr1Zr90iDzgaV/dUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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