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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7f742998caa15f23d3b2afc81482d50b9642d93ce34e9882273bb7c973ac4536' 
  AND token = 'Gxa99DPV5IKgOKXCo5staHhszWvAIRa1nNhVZ652V1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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