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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '22760924d12624ec70f43394ff2951e42362380dd28664fdba5c8f0f88843839' 
  AND token = 'HMfQjyaVC9Rk98SI5o0l0zk4CPo6Slzc8wR9QspW/NE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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