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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '22b32ddaa7975735e47c0b4378fa72a142e5a6e5def59c7fefd1f724ad59d43d' 
  AND token = 'mtuh7tFti8dpjfNN4wJi/h6qMhW6CBQhV7/63hfdZ5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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