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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07cd1e9203739d6c16638f787e891c44800618c34871a7d636f9ef2e33b3183b' 
  AND token = 'OZ+VM/0KW8MFm0D7gQT5R63MZJ3XMHDsJgPtaCWChPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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