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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cb4c5f73ffd5ae92ff17b536a1444fb502c1b9d23c17267b6e8fe04580290e9' 
  AND token = 'HVfxLKN0nZ/TEpBYqEn0ihMrl2ydq65FSywHETO31Iw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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