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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b70979d5c30b2a3f61e7bc9a1cddc9be308c9fee9b40ac704f1e99d6ef27a10' 
  AND token = 'wp0RjEJi6JAxoK8TxuqePbYif4VPFJ3JiEvVz1qCZsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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