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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9296b5f7f83c5fc019a06be37e2db3b2fb24a7383abbc6aa4c16dc04843d22eb' 
  AND token = 'e9jI3nbzDilN7OV9zeHCTJyuaTblyQmC0hF2GqfXZSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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