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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86c40b72d56d7d5ad84134dcef20ea0574b3b6df9ef20ce9a0b34330f3dda102' 
  AND token = 'oyXv55t3m7/yayN8QXk5UsCXdz8+a6tPIoNqvDnkGGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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