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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e48c4864c8f054210575c1eeb4eb170547faffdc6a09371cf2d6bc3446c04f7' 
  AND token = 'pR0zGEt2T1X/HXJxzHQRmiKzxOa6ZrGALt4t7xCYebg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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