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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9feb7268bf64dab2d13f5c35cfd84563ef9c7461fa7fc8ad6eaec3b437340ee5' 
  AND token = 'k9mdoYPyiTsJ7HprDp5pkbXfKvWev/1sYFl23otBjmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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