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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0150133d452783e38b994d2f0cc9d9cda68a0a56392b31ae8d60b080abd2d09' 
  AND token = 'kwzI4ftPL3rrYw4+ZusAu3XMPUvR7Ke9TSuw3ZATQSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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