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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aafa6ad25413362253fdf282ee5a3228bba4ee7a8877a2421c0fc90b02bd69f' 
  AND token = 'Qz7FtoNBJ2kkkIhpIup0/L9fyEQGsG6ByhRsabBHUVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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