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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9cc809f15747e09e74c9421ad154d674114583879d1ec83f5682f9c7801d87c9' 
  AND token = '8GbEybL0acv6oxJ7s+HmoodhTOj6YCBpNaT0Ixoj8CI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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