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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '864d5d19d0e9fe559c925c30b4fc63d3318949f6cbf5168d3c11ab1bdf034776' 
  AND token = 'S26Tp2R/sR6iq/HIfN/zg/RYJMyLJfTp547IkUXjraQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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