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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '667a2ee7d42cff779f5d7459d3b5ec449bbdfba9478a24bb3eea1bc5841f7162' 
  AND token = 'P4Rhryhn99SVt/yIkcFp+GxXFC88t1srhIVjMi5VD7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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