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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca94d47a635ee28a0a1638ed4c3b1e365a8d1d12dd9aafa343d15c10af130fd3' 
  AND token = '0og77dVQRlKaoHle0La9uxhyzY797FKqp3ggMowN6I0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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