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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc65ba7632bbdf6e3c264ce66e76433b7c453c5dec0989a9bc34cf74668d54db' 
  AND token = 'HB7095wxwK+4+b/M3sc0CIS0sJW4bgNpcxAUNxtuYVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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