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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a0c64ff92463ad0c54b9bd6f3b5d1ea1c72e19f4ee3fe74ef4d287449ff002b' 
  AND token = 'zHSHDf4qJMCwe9yfpSQsi9bpnaQj/xfXzRqlUrdrqy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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