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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '630f5af6a66deb58ade5b656428f49eec533f69d653819dc56be1803d6eb41f9' 
  AND token = 'CfITkwJoZAASIyK/8a3P7va68Nmw27tGuYfXuOx9T+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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