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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2750b961eb5c8443195506b337ffd34e18b9b6b6d27fc3f53151ecd668c49073' 
  AND token = 'Jpo6FZdCH2lisY8neNh0THCIAc1DUDmmzELmofaWG74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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