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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '389d3648e83fb952a22969c8e57888d130eb0df95637d2913c348224f3d04bb0' 
  AND token = 'DIGeqDPahcVe935jxfXzG95IsNiIn376JPu70X/aCXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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