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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef1504c9106f9d5c513a1e8194f4e2dc604321c662fa24ec962bd62c26b7023c' 
  AND token = '5Din1T8siXIihtKw/YP+xRJzkf1d332rtB5/TjOJ3gM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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