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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32bebddd45eea7e543b0cbee1b6b68966ef0e130ffbb6a8c3d4bdf866feeecf7' 
  AND token = '8WI/30E8vjlPjp+9mU02/xIP5RkRmnV/lmaXVnYtnsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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