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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80ea73698e6e6cf4ec7712ff35ea5dd7d7005454af6412ccf3ef0322197d692f' 
  AND token = 'w8UFQY+w5yVFzeMHxK2kQioLuxE/GlW7oYOC97WkW0k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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