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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f01b8ed409ba56fef7692490cef17d0e8910f3e07584b0810c51905139adedaf' 
  AND token = 'HlOgf8eCKlsJrXC06S/0av6T0y56viHk8qVLHEdMV5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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