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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd98b46c0d3b4d457bb5eeaecbdc493a4bb6bd5adb042b6cbff4a0ee6cb8e4be2' 
  AND token = 'Xi99C85nIRAmi8qcjB0mWqH4+lJ5kZGbBx9IbKQ3GZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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