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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34f39bfcfe06ddf442d30aaa0304ea80cbbef176f6c7725ae7dbd42196df60fe' 
  AND token = 'bGWTT48l0hJvR/WDRnn/4ah7zR09JKgmMpNS4bNW6+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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