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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b05baabb69ba9ecbfca021c40819e7c1a39dd7c739e1f0d52424c4bd1c8427c' 
  AND token = 'a0hrbIOWlze1gFZeZP6jBXrELOwkbvdPr66UweterwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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