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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '667d3b689d77ed536f3f621ba70c6e19016f8d0ff81289b503e6eeb0b4cb15ab' 
  AND token = 'ga/zhvVhVWfXMxmwoIp9yIwXK65VNSAWa35S9xz697Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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