SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a38213ff5aabf33c9568dad982be92cef0f69bae11a6e2808655719757f9361e' 
  AND token = 'YJJu83nFS+y+c2YVGJdlpVpbkJgE1WqTyimR2hsMjKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}