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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3addb4c54897a84d9f89c9b3ced2c8ad774539ef1aa2fba298777663eb1be8af' 
  AND token = 'HLVIHNkZOWbxptmYCs3QnXoYwx8vpg9M9kCIJ7Lv5Do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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