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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3309293d2cf93e6c520b2f197226d3d728d13c975431b5645cb319d0afc9a763' 
  AND token = 'kJwokvz6NeofN4N3/sgwxrYxbpHUhIVzrZ/OiclwcBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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