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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70f5c90977ef5039aacff1df1208de555560065fc8b5f5da3257d85cad9c19bd' 
  AND token = 'Wj/RKHsM5pBBRDPiWoPCwLvZqH4NcG0U/BfypRpQ4qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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